i have a chromecast v2 plugged into sony 2015 android tv (mainly for GA on/off command) , also i have a 2015 sony soundbar connected via hdmi cec.

chromecast is plugged in via AC, so its always on

soundbar normally powers on/off with tv.

when i turn on tv (via chromecast) with google assistant, both tv and soundbar turn on

problem i have is when i use google assistant to turn off tv (via CC), soundbar stays on.

i have checked hdmi-cec settings in tv - auto power on/off

also checked hdmi-cec settings on soundbar - everything set to auto.

tv -kd55x8500c

soundbar - ht-nt3

any help with my issues would be appreciated, 

cheers.